21A900

REF.

PART

 

REF.

PART

 

REF.

PART

 

NO.

NO.

DESCRIPTION

NO.

NO.

DESCRIPTION

NO.

NO.

DESCRIPTION

878

398661

Harness−Alternator

968

697420

Cover−Air Cleaner

1040

698368

Plate−Trim

883

K692236

Gasket−Exhaust

 

 

(Black)

 

 

Used on Type No(s).

884

691956

Clamp−Muffler

 

 

−−−−−− Note −−−−−−

 

 

0104, 0113, 0121,

 

 

Used on Type No(s).

 

 

697422 Cover−Air

 

 

0122, 0133, 0137,

 

 

0121, 0122, 0173.

 

 

Cleaner

 

 

0140, 0143, 0152,

914

691108

Screw

 

 

(Red)

 

 

0155, 0158, 0164,

 

 

(Rocker Cover)

972

792168

Tank−Fuel

 

 

0167, 0169, 0172,

918

791851

Hose−Vacuum

 

 

(Plastic)

 

 

0173, 0178, 0186.

 

 

(Molded)

975

495933

Bowl−Float

1040A

697381

Plate−Trim

920

691656

Solenoid−Starter

 

 

(Walbro)

 

 

Used on Type No(s).

 

 

Used on Type No(s).

975A

698783

Bowl−Float

 

 

0101, 0105, 0119,

 

 

0147, 0150, 0172,

 

 

(Nikki)

 

 

0120, 0129, 0131,

 

 

0186.

977

690192

Gasket Set−Carburetor

 

 

0154, 0156, 0165,

943

K690589

Seal−O Ring

977A

790032

Gasket Set−Carburetor

 

 

0180, 0183, 0189,

 

 

(Oil Pump Cover)

 

 

(Nikki)

 

 

0189, 0192, 0195,

950

691657

Screw−Float Bowl

987

D691326

Seal−Throttle Shaft

 

 

0197, 0198, 0199.

 

 

(Bottom Of Bowl)

987A

D698777

Seal−Throttle Shaft

1044

698139

Screw

957

792647

Cap−Fuel Tank

 

 

(Nikki)

 

 

(Flywheel)

 

 

(Plastic)

1005

794439

Fan−Flywheel

1051

691265

Ring−Retaining

958

698183

Valve−Fuel Shut Off

 

 

(Used After Code Date

1054

280275

Tie−Cable

 

 

(Plastic)

 

 

07040800).

1058

276344

Manual−Operator’s

 

 

Used on Type No(s).

1005A

794440

Fan−Flywheel

 

 

−−−−−− Note −−−−−−

 

 

0141, 0144, 0146,

 

 

(Used Before Code

 

 

MS3787 Manual−

 

 

0154, 0156, 0157,

 

 

Date 07040900).

 

 

Operator’s

 

 

0159, 0161, 0167,

1005B

 

Fan−Flywheel

 

 

Used on Type No(s).

 

 

0171, 0172, 0179,

 

 

(No Longer Available)

 

 

0101, 0134, 0164,

 

 

0185, 0186, 0190,

 

 

(See Reference1005A

 

 

0165, 0170, 0189,

 

 

0191.

 

 

For Service Flywheel

 

 

0197.

965

499613

Cover−Oil Pump

 

 

Fan).

 

 

MS3788 Manual−

967

697292

Filter−Pre Cleaner

1017

690770

Screen−Oil Pump

 

 

Operator’s

 

 

 

1022KΔ272475S

Gasket−Rocker Cover

 

 

Used on Type No(s).

 

 

 

 

 

(Used Before Code

 

 

0105, 0191.

 

 

 

 

 

Date 07091000).

1059

698516

Kit−Screw/Washer

 

 

 

 

 

(After Date Code Use

1070

690372

Screw

 

 

 

 

 

liquid Sealant

 

 

(Flywheel Fan)

 

 

 

 

 

Reference 850)

 

 

(Used Before Code

 

 

 

1023

794659

Cover−Rocker

 

 

Date 07040900).

 

 

 

1024

499054

Pump−Oil

1070A

690363

Screw

 

 

 

 

 

(Used Before Code

 

 

(Flywheel Fan)

 

 

 

 

 

Date 07051700).

 

 

(Used After Code Date

 

 

 

1024A

794644

Pump−Oil

 

 

07040800).

 

 

 

 

 

(Used After Code Date

1090

691293

Retainer−Brush

 

 

 

 

 

07051600).

1091

691333

Cap−Limiter

 

 

 

1026

697395

Rod−Push

1095

691581

Gasket Set−Valve

 

 

 

 

 

(Exhaust)

1119

691183

Screw

 

 

 

 

 

−−−−−− Note −−−−−−

 

 

(Alternator)

 

 

 

 

 

697394 Rod−Push

1127

695407

Screw

 

 

 

 

 

(Intake)

 

 

(Float Bowl)

 

 

 

1027

492932S

Filter−Oil

1136

690278

Screw

 

 

 

1029

691751

Arm−Rocker

 

 

(Control Bracket)(High

 

 

 

1034

690822

Guide−Push Rod

 

 

Speed Control)

 

 

 

1036

 

Label−Emissions

 

 

Used on Type No(s).

 

 

 

 

 

(Available From A

 

 

0139, 0140, 0142,

 

 

 

 

 

Briggs & Stratton

 

 

0166.

 

 

 

 

 

Authorized Dealer)

1146

793380

Screw

 

 

 

 

 

 

 

 

(Choke Shaft)(Manual

 

 

 

 

 

 

 

 

Choke)

 

 

 

 

 

 

 

 

 

KIncluded in Engine Gasket Set−Ref. No. 358.

DIncluded in Carburetor Overhaul Kit−Ref. No. 121 or 121A.

zIncluded in Carburetor Gasket Set−Ref. No. 977 or 977A. Δ Included in Valve Gasket Set−Ref. No. 1095.

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5069−17

Assemblies include all parts shown in frames.

02/07/2008

17

Page 17
Image 17
Briggs & Stratton 21A900 398661, 968 697420, 1040 698368, 691956, 691108, 972 792168, 791851, 975 495933, 1040A 697381

21A900 specifications

Briggs & Stratton is a name synonymous with reliability and innovation in the small engine industry. Among its varied product lineup, the Briggs & Stratton 21A900 stands out for its performance and efficiency, making it an excellent choice for both homeowners and professionals.

The Briggs & Stratton 21A900 is a versatile engine specifically designed for lawn mowers and other outdoor power equipment. One of its hallmark features is its compact design, making it lightweight while still delivering robust performance. This makes it an ideal choice for residential lawn care, as well as for commercial landscaping operations.

One of the key technologies employed in the 21A900 is the Overhead Valve (OHV) design. This technology enhances engine efficiency by placing the valves in the cylinder head, allowing for better airflow and improved combustion. This results in increased power output and fuel efficiency, making it eco-friendlier compared to older engine designs.

In addition, the engine is equipped with a reliable starter mechanism, which enables easy starts even in cold conditions. The ReadyStart® system is a notable feature that eliminates the need for manual priming or choking, ensuring that users can get to work with minimal fuss.

The 21A900 also boasts a governor system designed to maintain engine speed under varying loads. This is particularly beneficial for lawn mowers, as it allows the engine to adjust power output automatically when encountering tougher grass or uneven terrain. As a result, users can enjoy consistent performance without constantly adjusting the throttle.

Durability is another significant characteristic of the 21A900. Briggs & Stratton engines are known for their rugged construction and the 21A900 is no exception. Built with high-quality materials, it promises long-lasting performance and reduced maintenance issues, which translates to lower total cost of ownership for users.

Maintenance is made easier with the inclusion of features such as a top-mounted oil fill and a convenient oil drain. This user-friendly design simplifies routine oil checks and changes, ensuring that the engine stays in top shape.

In summary, the Briggs & Stratton 21A900 engine combines advanced technologies, user-friendly features, and durable construction to deliver a powerful and efficient solution for outdoor power equipment. Whether used in a residential or commercial setting, the 21A900 ensures reliable performance for all lawn care needs. This engine exemplifies the commitment of Briggs & Stratton to quality and innovation, making it a trusted choice for users around the world.